1 big cucumber or 3 small Persian cucumbers, finely chopped or grated
2 cups Greek/drained yogurt
2-3 cloves garlic, mortar-and-pestled with a little salt
2 tbsp chopped mint
2 tbsp olive oil
salt and pepper
Salt the cucumber, let it sit, rinse and drain on paper towels. Combine everything.
Source: https://cooking.nytimes.com/recipes/1016438-tzatziki